Neutrino masses in the Lee-Wick standard model

作     者：José Ramón Espinosa Benjamín Grinstein Donal O’Connell Mark B. Wise 

作者机构：IFT-UAM/CSIC Cantoblanco 28049 Madrid Spain Department of Physics University of California at San Diego La Jolla California 92093 USA California Institute of Technology Pasadena California 91125 USA 

出 版 物：《Physical Review D》 (Phys Rev D Part Fields Gravit Cosmol)

年 卷 期：2008年第77卷第8期

页      面：085002-085002页

核心收录：

学科分类：07[理学] 0827[工学-核科学与技术] 0704[理学-天文学] 0702[理学-物理学] 

摘      要：Recently, an extension of the standard model based on ideas of Lee and Wick has been discussed. This theory is free of quadratic divergences and hence has a Higgs mass that is stable against radiative corrections. Here, we address the question of whether or not it is possible to couple very heavy particles, with masses much greater than the weak scale, to the Lee-Wick standard model degrees of freedom and still preserve the stability of the weak scale. We show that in the LW-standard model the familiar seesaw mechanism for generating neutrino masses preserves the solution to the hierarchy puzzle provided by the higher derivative terms. The very heavy right-handed neutrinos do not destabilize the Higgs mass. We give an example of new heavy degrees of freedom that would destabilize the hierarchy, and discuss a general mechanism for coupling other heavy degrees of freedom to the Higgs doublet while preserving the hierarchy.